论文部分内容阅读
研究了二维三角晶格光子晶体环形腔和微腔的谐振规律和耦合特性,采用1个环形腔搭配2个微腔的结构形式,设计了一种新型高效的四通道解波分复用器,不仅实现了对波长分别为1471、1511、1551、1591 nm光波的解波分复用,而且使器件尺寸明显减小。利用时域有限差分法详细分析了环形腔中心柱数量和半径对其透射谱的影响,结果表明:环形腔具有多模的特性,改变环形腔的中心柱半径可以调控其谐振波长,结合微腔的选频效应,最终使四通道解波分复用器各通道的透射率达到90%以上,通道隔离度大于20 d B。同时调节方法简单、耦合效率较高,在全光通信集成领域具有潜在的应用价值。
The resonant law and the coupling characteristic of two-dimensional triangular lattice photonic crystal ring cavity and microcavity are studied. A ring cavity with two microcavities structure is designed and a new efficient four-channel demultiplexer , Not only achieved the wavelength resolution of 1471,1511,1551,1591 nm wave division multiplexing, but also significantly reduce the size of the device. The results show that the annular cavity has the characteristics of multimode. By changing the radius of the central column of the annular cavity, the resonant wavelength can be controlled. Combined with the characteristics of the microcavity Of the frequency-selective effect, the final four-channel wavelength division multiplexer channel transmittance of more than 90%, channel isolation greater than 20dB. At the same time, the adjustment method is simple and the coupling efficiency is high, which has potential application value in the field of all optical communication integration.